Bug#886742: postgresql-9.4-postgis-2.1 missing in stretch

[Christoph Berg]

Control: tags -1 moreinfo

Re: Juergen Fuchsberger 2018-01-09 <20180109130149.17725.10545.reportbug at wegc203058.uni-graz.at>
> Due to missing postgresql-9.4-postgis-2.1 in stretch, a postgis enabled
> database becomes corrupt when upgrading from jessie to stretch since
> the required postgis libraries are missing. This can cause serious data
> loss, because once upgraded to stretch, the postgis data can't be
> accesed nor dumped (Database gives error "could not access file
> "$libdir/postgis-2.1": no such file or directory"). 

Could you append the apt output to this bug? Namely, which packages
got removed? (/var/log/apt/term.log)

> Also upgrading the database to postgresql-9.6 does not work. 

What did you try, and what didn't work?

Christoph